Failure investigation of a Kaplan turbine blade lever

被引：8
作者：
Cao, Jingwei [1 ,2 ]
Yang, Guangdong [3 ]
Luo, Yongyao [1 ,2 ]
Chen, Jie [3 ]
Liao, Run [3 ]
Wang, Zhengwei [1 ,2 ]
机构：
[1] Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Energy & Power Engn, Beijing 100084, Peoples R China
[3] Yalong River Hydropower Dev Co Ltd, Sichuan 610051, Peoples R China
来源：
ENGINEERING FAILURE ANALYSIS | 2022年 / 142卷
关键词：
Kaplan turbine; Blade lever; Fracture; Multibody dynamics; Fluid -structure interaction; DYNAMIC STRESSES; BEHAVIOR;
D O I：
10.1016/j.engfailanal.2022.106840
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The control mechanism of the Kaplan turbine is quite complex, and many of the failure cases of the control mechanism have been reported. The present work analyzed a failure case of the blade lever based on the multibody mechanics and fluid-structure interaction method. The flow characteristics in 49 operating conditions are simulated, and the pressure on the runner surface is applied on the FEM model. A dynamic stress isoline is proposed to carry out an in-depth analysis of the failure reason of the blade lever in full operating conditions. The fracture of the blade lever could be attributed to long time operation in high dynamic stress region, which leads to the accelerated fatigue damage. Results in this paper could be helpful for the design, operation and maintenance of the Kaplan turbine.
引用
收藏
页数：13
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